I think your plan sounds great -go for it.
If you don't, you may look back someday and regret missing the experience while you were free to do it. I took off for two months in Europe on the cheap when I was 21 and had the time of my life. A great experience that has stayed with me for decades and shaped the course of my life in some ways.
My two brothers still talk about their cross country adventures in a VW van in the 1970s after their Vietnam days.
A B can give you a lot of freedom and mobility since it combines car with sleeping quarters. The trick will be finding a reliable one at a decent price. Work for a while, save some cash for emergencies, and get some major medical coverage. Then hit the road.
Good luck and let us know how it goes!!